anthony



(No Model.)

B. A. ANTHONY.

v PHOTOGRAPHIG PLATE HOLDER. No, 439,808

WITNESSES ATTORNEY UNITED STATES PATENT OFFICE.

RICHARD A. ANTHONY, OF NElV YORK, N. Y., ASSIGNOR TO THE E. & H. T.ANTHONY & COMPANY, OF SAME PLACE.

PHOTOGRAPHlC-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 439,808, dated November4, 1890.

Application filed March 6, 1890. Serial No. 342,898. (No model.)

To all whom it may concern.-

Be itknown that I, RICHARD A. ANTHONY, a citizen of the United States,and a resident of New York, in the county of New York and State of NewYork, have invented certain new and useful Improvements in Photographic-Plate Holders, of which the following is a specification.

My invention relates to improvements in plate-holders for photographicapparatus; and it consists in a new and effective construction of theslide-locking devices, whereby they are firmly held in the plate-holderuntil their re moval is desired.

In the drawings the same reference-letters indicate the same parts inall the figures.

Figure 1 is an elevation of the front of a double plate-holder having myslide-lock attached, the slide on the side presented to view beingremoved. Fig. 2 is an edge view of the parts shown in Fig. 1. Fig. 3 isan end view of the plate-holder, both of the slides bein g in theirclosed position and locked therein by the slide-lock. Fig. 4 is a viewthe same as Fig. 3,the slide-lock being unlocked for the removal of thelower slide.

It will be obvious that although I show my improvements as applied to adouble plateholder, it may be equally well employed in single holders.

A is the frame of theplate-holder. It may be constructed in anypreferred manner.

B B are the slides.

D is the usual diaphragm, (or the back of the holder if it be asingleplate-holder.) It is provided with the usual springE for pressing theplate forward. These parts are or may be made in any preferred form.

F is my improved lock for the slides, which I have found much moreeffective, simple, and convenient than anyheretofore known to me. Thelock proper comprises a screw or equivalent pivot G, which is fastenedin. the end of the frame of theholder. It passes through a hole made inthe foot orbase H of the lock and the lock swivels on it. A spring I,abutting against the head of the pivot G at one end and pressing againstthe base II at the other end, puts the lock under spring-friction, sothat it will remain in any position in which it is left. Any othersuitable means may be employed for securing this result. The upper partof the lock is provided with a plate or bar J, terminating at each endin lateral projections K K, which are preferably provided withthumbpieces L L. whereby the lock can be easily swung or turned on itspivot. The construction and dimensions of the parts of the lock are suchthat it will ordinarily engage with the ends of both of the slides, andthey can only be withdrawn when the lockis intentionally placed in theposition shown in Fig. 4. \Vhen so placed, it is obvious that the lowerslide can be withdrawn, and of course when swung into directly thereverse position the upper slide can be withdrawn.

Itwill be observed that I cutaway the projecting part M of the slides,which are grasped by the finger and thumb for their withdrawal from theholder at one side of each slide, and that the projecting parts which Ileave are upon opposite sides of the slides. This I do so that theprojection M on one slide may not interfere with the finger or thumb ofthe operator when desiring to withdraw the other slide from the holderand when manipulating the slide-lock.

I do not limit myself to the precise details of construction of theparts as shown and described, because it will be obvious to those whoare familiar with this art that various modifications may be employedand still the essentials of my invention be present.

I claim 1. A plate-holderprovided with a slide-lock eccentricallypivoted to the plate-holder and adapted to have a rotary movement onlyrelative to its pivot and to be successively engaged with and disengagedfrom the ends of the slides by simply turning on its pivot, the relationbetween the lock and the plate-holder being such that no part of thelock at any time projects beyond the sides of the plateholder,substantially as set forth.

2. A plate-holder provided with a frictionheld slide-lock eccentricallypivoted to the plate-holder and adapted to have rotary movement onlyrelative to its pivot and to be suc- "cessively engaged with anddisengaged from Yoi'k and State of New York, this 28th day of the endsof the slides by simply tu rning on its February, A. D. 1890. pivot therelation between the look and the '1 plate holder being such that nopart of the I RICHARD ANIHONY' 5 look at any time projects beyond thesides of Witnesses:

the plate-holder, substantially as set forth. Y M. WILCOX,

Signed at New York, in the county of New F. A. ANTHONY.

